Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Interest Income
Interest and fees on loans	$ 219,013	$ 213,099	$ 220,784
Interest on investment securities:
Taxable interest income	32,076	20,429	19,881
Tax-exempt interest income	2,402	725	1,007
Other, principally overnight investments	2,427	3,431	8,435
Total interest income	255,918	237,684	250,107
Interest Expense
Savings, checking and money market accounts	4,520	6,551	9,551
Time deposits of $100,000 or more	2,549	8,215	13,598
Other time deposits	812	1,535	1,901
Borrowings	1,642	3,261	8,853
Total interest expense	9,523	19,562	33,903
Net interest income	246,395	218,122	216,204
Provision for loan losses	9,611	35,039	2,263
Provision for unfunded commitments	5,420	0	0
Total provision for credit losses	15,031	35,039	2,263
Net interest income after provision for credit losses	231,364	183,083	213,941
Noninterest Income
Service charges on deposit accounts	12,317	11,098	12,970
Other service charges, commissions and fees	25,516	20,097	19,481
Fees from presold mortgage loans	10,975	14,183	3,944
Commissions from sales of insurance and financial products	6,947	8,848	8,495
SBA consulting fees	7,231	8,644	3,872
SBA loan sale gains	7,329	7,973	8,275
Bank-owned life insurance income	2,885	2,533	2,564
Securities (losses) gains, net	(1,237)	8,024	97
Other gains (losses), net	1,648	(54)	(169)
Total noninterest income	73,611	81,346	59,529
Noninterest Expense
Salaries	86,815	84,941	79,129
Employee benefits	16,434	16,027	16,844
Total personnel expense	103,249	100,968	95,973
Occupancy expense	11,528	11,278	11,122
Equipment related expenses	4,492	4,285	5,023
Merger and acquisition expenses	16,845	0	192
Intangibles amortization	3,531	3,956	4,858
Foreclosed property losses, net	24	547	939
Other operating expenses	44,987	40,264	39,087
Total noninterest expense	184,656	161,298	157,194
Income before income taxes	120,319	103,131	116,276
Income tax expense	24,675	21,654	24,230
Net income	$ 95,644	$ 81,477	$ 92,046
Earnings per common share: Basic (in usd per shares)	$ 3.19	$ 2.81	$ 3.10
Earnings per common share: Diluted (in usd per share)	3.19	2.81	3.10
Dividends declared per common share (in usd per shares)	$ 0.80	$ 0.72	$ 0.54
Weighted average common shares outstanding:
Basic (in shares)	29,876,151	28,839,866	29,547,851
Diluted (in shares)	30,027,785	28,981,567	29,720,499